22399981380 has 240 divisors, whose sum is σ = 81411200640. Its totient is φ = 5049672192.

The previous prime is 22399981361. The next prime is 22399981423. The reversal of 22399981380 is 8318999322.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 814291 + ... + 841349.

It is an arithmetic number, because the mean of its divisors is an integer number (339213336).

Almost surely, 2^22399981380 is an apocalyptic number.

22399981380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22399981380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40705600320).

22399981380 is an abundant number, since it is smaller than the sum of its proper divisors (59011219260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22399981380 is a wasteful number, since it uses less digits than its factorization.

22399981380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27160 (or 27149 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 54.

The spelling of 22399981380 in words is "twenty-two billion, three hundred ninety-nine million, nine hundred eighty-one thousand, three hundred eighty".